Hi Hilmar

>This means that Uranus will "pass" Neptune once every 172 years, approximately. At that moment - once every 172 years - they will be more or less in the same direction, as seen from Earth. 86 years later, they will be on opposite side. This should also happen once very 172 years, approximately.

Thanks a lot for the explanation, in a way I was siliently hoping that Rahu and Ketu (they are supposed to be opposite to each other perpetually) in Indian Astro(?) would be the representation of Uranus and Neptune, well I guess I was wrong. No problem.

Thanks a lot for replying to my silly question.